If we must make this comparison, most actual companies are totalitarian dictatorships.

> We can all opt out of Facebook.

Can we? What is the practical effect of doing so? Will they stop tracking us on the web? Will they stop gathering data about us via people with whom we are associated?

Facebook is a crowd-sourced global surveillance program from which there is no real opt-out and over which there are no checks and balances because most of the people running it don't even think they're running a surveillance program.